Nouveau - Jun 2014 - [Bug 79611] New: [NVC0] TRAP ch 4 [0x003fa28000 bzflag]

https://bugs.freedesktop.org/show_bug.cgi?id=79611

          Priority: medium
            Bug ID: 79611
          Assignee: nouveau at lists.freedesktop.org
           Summary: [NVC0] TRAP ch 4 [0x003fa28000 bzflag]
          Severity: normal
    Classification: Unclassified
                OS: Linux (All)
          Reporter: anonymous at dodgeit.com
               URL: http://bzflag.org/downloads
          Hardware: x86-64 (AMD64)
            Status: NEW
           Version: 10.1
         Component: Drivers/DRI/nouveau
           Product: Mesa

Created attachment 100377
  --> https://bugs.freedesktop.org/attachment.cgi?id=100377&action=edit
dmesg of nouveau before during and after the crash

Pro-longed play of BZFlag or joining a very popular room for < 30mins where
there are a lot of explosions will cause nouveau to crash. There is brief
jitter followed by a prompt coredump.Attached is the dmesg log and the game for
use as a test case.

I am using the latest 3.14.4 kernel with mesa 10.1 on Arch.

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--- Comment #1 from Ilia Mirkin <imirkin at alum.mit.edu> ---
Did this happen with earlier versions of mesa? If you can reproduce at will, an
apitrace would be nice. (30 mins would be ridiculous though.) I'm not aware
of
any opcode emission bugs with nvc0 cards.

Another thing to try would be to make a debug mesa build, and run the game with
NV50_PROG_OPTIMIZE=0 -- that turns off all shader code optimizations, which
would make it even less likely to hit a "weird" instruction emission
situation.

This might also be some vram corruption/buffer copy issues/something else
unrelated to opcode emission...

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--- Comment #2 from Anonymous Helper <anonymous at dodgeit.com> ---
The bug is reproducible at will within the time given. I have captured an
APITrace but it was over 30GB. Would you like a trimmed version? The trim seems
to break the apitrace replay function but does retain various technical
information. It's only about 70MB for the last 2k frames.

I am not sure how to make a debug build, but if you could point me in the right
direction I can try. Please note that some site I found was claiming over 2GB
to compile. My ISP doesn't even allow that data much per month on the
current
plan. 

Thanks.

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GitLab Migration User <gitlab-migration at fdo.invalid> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|---                         |MOVED

--- Comment #3 from GitLab Migration User <gitlab-migration at
fdo.invalid> ---
-- GitLab Migration Automatic Message --

This bug has been migrated to freedesktop.org's GitLab instance and has been
closed from further activity.

You can subscribe and participate further through the new bug through this link
to our GitLab instance: https://gitlab.freedesktop.org/mesa/mesa/issues/1065.

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